J-Tech Digital &Acirc; Premium Quality Dual-Band HDMI IR Extender Over HDMI Support HDMI cabel length up to 25M between teh TX and RX adapters, depends on cable quality Adopts dual-band (30KHz - 60KHz) IR receiver and transmitter for best compatibility Support ARC, Plug & Play Power Free; No Power Adapter Necessary (Uses power over HDMI from HDMI source unit) Free lifetime technical support from the manufacture and free 1 Year Manufacturer Warranty from J-Tech Digital.